Accession Number : AD0814884

Title :   A NEW MIXING LENGTH THEORY FOR TURBULENT FLOWS IN DYNAMIC EQUILIBRIUM.

Descriptive Note : Technical rept.,

Corporate Author : TRW SYSTEMS GROUP REDONDO BEACH CA

Personal Author(s) : Webb, W. H.

Report Date : MAR 1967

Pagination or Media Count : 42

Abstract : A self-contained mixing length theory for turbulent flows in dynamic equilibrium is arrived at. The theory predicts a priori the existence of the laminar sublayer and, when account of viscous dissipation effects near the wall is taken, agrees well with detailed experimental data for both mean and fluctuating quantities without the need for ad hoc fitting constants. The theory leads to the result that the wall friction coefficient may be made independent of Reynolds number of employing the proper normalizing velocity and, using this information, the calculation of wall friction or of pressure drop for a given mean flow velocity is possible. (Author)

Descriptors :   (*TURBULENCE, SHEAR STRESSES), (*SUPERSONIC FLOW, TURBULENCE), DIFFUSION, DISTRIBUTION, THEORY, COMPRESSIVE PROPERTIES, PRANDTL NUMBER, NUMERICAL INTEGRATION, TRANSPORT PROPERTIES, THICKNESS, SKIN FRICTION, LAMINAR BOUNDARY LAYER, REYNOLDS NUMBER, PRESSURE, CORRELATION TECHNIQUES, TURBULENT BOUNDARY LAYER, FLOW FIELDS, EQUILIBRIUM(PHYSIOLOGY), MIXTURES, WALLS, SURFACE ROUGHNESS.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE